Pineal gland produces

Options

A. Glucagon
B. Aldosterone
C. Cortisone
D. Melatonin.

Answer

**Step-by-Step Solution:**

1. **Identify the Gland**: The question asks about the pineal gland, which is a small endocrine gland located in the brain.

2. **Determine the Hormone Produced**: The primary hormone produced by the pineal gland is melatonin.

3. **Understand the Source of Melatonin**: Melatonin is derived from the amino acid tryptophan. This conversion occurs in the pineal gland.

4. **Function of Melatonin**: Melatonin plays a crucial role in regulating the body’s circadian rhythms, which include the sleep-wake cycle, body temperature, and other metabolic processes.

5. **Evaluate Other Options**: The question provides other hormone options: glucagon, aldosterone, and cortisone.
- Glucagon is produced by the alpha cells of the pancreas.
- Aldosterone is a mineralocorticoid hormone secreted from the adrenal cortex.
- Cortisone is a steroid hormone also secreted from the adrenal cortex.
- Since none of these hormones are produced by the pineal gland, they are incorrect options.

6. **Conclusion**: The correct answer to the question "Pineal gland produces" is melatonin.

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